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Helmut Petri
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Stand Alone
Helmut Petri — Books & Biography | Menrva Books
![Festschrift zum 65. [fünfundsechzigsten] Geburtstag von Helmut Petri](/_next/image?url=https%3A%2F%2Fstorage.googleapis.com%2Fmenrva_img_storage%2Fcovers%2Fopenlibrary%2F4478288.jpg&w=3840&q=80)
